diff options
Diffstat (limited to 'progs')
52 files changed, 536 insertions, 138 deletions
diff --git a/progs/samples/prim.c b/progs/samples/prim.c index 388e0153b4..f47c60faef 100644 --- a/progs/samples/prim.c +++ b/progs/samples/prim.c @@ -466,7 +466,7 @@ static void Draw(void) } else { glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); } - +#if 01 Viewport(0, 0); Point(); Viewport(0, 1); Lines(); Viewport(0, 2); LineStrip(); @@ -479,10 +479,12 @@ static void Draw(void) Viewport(1, 3); TriangleStrip(); Viewport(2, 0); Rect(); +#endif Viewport(2, 1); PolygonFunc(); +#if 01 Viewport(2, 2); Quads(); Viewport(2, 3); QuadStrip(); - +#endif glFlush(); if (doubleBuffer) { diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile index 341c115c07..2edf0ae008 100644 --- a/progs/trivial/Makefile +++ b/progs/trivial/Makefile @@ -12,6 +12,7 @@ LIBS = $(APP_LIB_DEPS) SOURCES = \ clear.c \ + fs-tri.c \ line-clip.c \ line-cull.c \ line-userclip-clip.c \ @@ -63,6 +64,7 @@ SOURCES = \ tri-unfilled.c \ tri-userclip.c \ tri-dlist.c \ + tri-z.c \ tri.c \ tristrip-clip.c \ tristrip.c \ @@ -137,6 +139,11 @@ readtex.c: $(TOP)/progs/util/readtex.c ln -s $(TOP)/progs/util/readtex.c . +fs-tri: fs-tri.c extfuncs.h + + +extfuncs.h: $(TOP)/progs/util/extfuncs.h + cp $< . # Emacs tags diff --git a/progs/trivial/clear.c b/progs/trivial/clear.c index 7e7ca588c3..69931b5818 100644 --- a/progs/trivial/clear.c +++ b/progs/trivial/clear.c @@ -108,7 +108,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/dlist-dangling.c b/progs/trivial/dlist-dangling.c index 97f878e96b..00a7507844 100644 --- a/progs/trivial/dlist-dangling.c +++ b/progs/trivial/dlist-dangling.c @@ -131,7 +131,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/dlist-edgeflag-dangling.c b/progs/trivial/dlist-edgeflag-dangling.c index 31300efd84..b993946320 100644 --- a/progs/trivial/dlist-edgeflag-dangling.c +++ b/progs/trivial/dlist-edgeflag-dangling.c @@ -134,7 +134,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/dlist-edgeflag.c b/progs/trivial/dlist-edgeflag.c index fa97f04103..9e190db700 100644 --- a/progs/trivial/dlist-edgeflag.c +++ b/progs/trivial/dlist-edgeflag.c @@ -138,7 +138,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/fs-tri.c b/progs/trivial/fs-tri.c new file mode 100644 index 0000000000..3be4d42e54 --- /dev/null +++ b/progs/trivial/fs-tri.c @@ -0,0 +1,212 @@ +/* Test fragment shader */ + +#include <assert.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> +#include <math.h> +#include <GL/gl.h> +#include <GL/glut.h> +#include <GL/glext.h> +#include "extfuncs.h" + + +static GLuint fragShader; +static GLuint vertShader; +static GLuint program; +static GLint win = 0; +static GLfloat xpos = 0, ypos = 0; + + +static void +Redisplay(void) +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glPushMatrix(); + glTranslatef(xpos, ypos, 0); + + glBegin(GL_TRIANGLES); + glColor3f(1, 0, 0); + glVertex2f(-0.9, -0.9); + glColor3f(0, 1, 0); + glVertex2f( 0.9, -0.9); + glColor3f(0, 0, 1); + glVertex2f( 0, 0.9); + glEnd(); + + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void +Reshape(int width, int height) +{ + glViewport(0, 0, width, height); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-1, 1, -1, 1, -1, 1); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); +} + + +static void +CleanUp(void) +{ + glDeleteShader_func(fragShader); + glDeleteShader_func(vertShader); + glDeleteProgram_func(program); + glutDestroyWindow(win); +} + + +static void +Key(unsigned char key, int x, int y) +{ + (void) x; + (void) y; + + switch(key) { + case 27: + CleanUp(); + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void +SpecialKey(int key, int x, int y) +{ + const GLfloat step = 0.1; + + (void) x; + (void) y; + + switch(key) { + case GLUT_KEY_UP: + ypos += step; + break; + case GLUT_KEY_DOWN: + ypos -= step; + break; + case GLUT_KEY_LEFT: + xpos -= step; + break; + case GLUT_KEY_RIGHT: + xpos += step; + break; + } + glutPostRedisplay(); +} + + +static void +LoadAndCompileShader(GLuint shader, const char *text) +{ + GLint stat; + + glShaderSource_func(shader, 1, (const GLchar **) &text, NULL); + + glCompileShader_func(shader); + + glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat); + if (!stat) { + GLchar log[1000]; + GLsizei len; + glGetShaderInfoLog_func(shader, 1000, &len, log); + fprintf(stderr, "fslight: problem compiling shader:\n%s\n", log); + exit(1); + } +} + + +static void +CheckLink(GLuint prog) +{ + GLint stat; + glGetProgramiv_func(prog, GL_LINK_STATUS, &stat); + if (!stat) { + GLchar log[1000]; + GLsizei len; + glGetProgramInfoLog_func(prog, 1000, &len, log); + fprintf(stderr, "Linker error:\n%s\n", log); + } +} + + +static void +Init(void) +{ + /* fragment color is a function of fragment position: */ + static const char *fragShaderText = + "void main() {\n" + " gl_FragColor = gl_FragCoord * vec4(0.005); \n" + " //gl_FragColor = gl_Color; \n" + " //gl_FragColor = vec4(1, 0, 0.5, 0); \n" + "}\n"; +#if 0 + static const char *vertShaderText = + "varying vec3 normal;\n" + "void main() {\n" + " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n" + " normal = gl_NormalMatrix * gl_Normal;\n" + "}\n"; +#endif + const char *version; + + version = (const char *) glGetString(GL_VERSION); + if (version[0] != '2' || version[1] != '.') { + printf("This program requires OpenGL 2.x, found %s\n", version); + exit(1); + } + + GetExtensionFuncs(); + + fragShader = glCreateShader_func(GL_FRAGMENT_SHADER); + LoadAndCompileShader(fragShader, fragShaderText); + +#if 0 + vertShader = glCreateShader_func(GL_VERTEX_SHADER); + LoadAndCompileShader(vertShader, vertShaderText); +#endif + + program = glCreateProgram_func(); + glAttachShader_func(program, fragShader); +#if 0 + glAttachShader_func(program, vertShader); +#endif + glLinkProgram_func(program); + CheckLink(program); + glUseProgram_func(program); + + assert(glGetError() == 0); + + glClearColor(0.3f, 0.3f, 0.3f, 0.0f); + + printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER)); +} + + +int +main(int argc, char *argv[]) +{ + glutInit(&argc, argv); + glutInitWindowPosition( 0, 0); + glutInitWindowSize(200, 200); + glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); + win = glutCreateWindow(argv[0]); + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutSpecialFunc(SpecialKey); + glutDisplayFunc(Redisplay); + Init(); + glutMainLoop(); + return 0; +} + + diff --git a/progs/trivial/line-clip.c b/progs/trivial/line-clip.c index 9acd12acc7..fd79d049c4 100644 --- a/progs/trivial/line-clip.c +++ b/progs/trivial/line-clip.c @@ -122,7 +122,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/line-cull.c b/progs/trivial/line-cull.c index 8999a8f0b1..038004b4c4 100644 --- a/progs/trivial/line-cull.c +++ b/progs/trivial/line-cull.c @@ -118,7 +118,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/line-userclip-clip.c b/progs/trivial/line-userclip-clip.c index b24d8452bc..5c9c1b3b29 100644 --- a/progs/trivial/line-userclip-clip.c +++ b/progs/trivial/line-userclip-clip.c @@ -124,7 +124,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/line-userclip-nop-clip.c b/progs/trivial/line-userclip-nop-clip.c index e2e0b85a52..a6ee44fbd0 100644 --- a/progs/trivial/line-userclip-nop-clip.c +++ b/progs/trivial/line-userclip-nop-clip.c @@ -124,7 +124,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/line-userclip-nop.c b/progs/trivial/line-userclip-nop.c index eacee06978..cebea5f481 100644 --- a/progs/trivial/line-userclip-nop.c +++ b/progs/trivial/line-userclip-nop.c @@ -124,7 +124,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/line-userclip.c b/progs/trivial/line-userclip.c index 6af91431d0..ecfd28cac7 100644 --- a/progs/trivial/line-userclip.c +++ b/progs/trivial/line-userclip.c @@ -124,7 +124,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/line.c b/progs/trivial/line.c index 58bad91b05..b435a2689a 100644 --- a/progs/trivial/line.c +++ b/progs/trivial/line.c @@ -40,7 +40,7 @@ static void Init(void) fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); - glClearColor(0.0, 0.0, 1.0, 0.0); + glClearColor(0.3, 0.3, 0.3, 0.0); } static void Reshape(int width, int height) diff --git a/progs/trivial/lineloop-clip.c b/progs/trivial/lineloop-clip.c index d8645ee347..211056720f 100644 --- a/progs/trivial/lineloop-clip.c +++ b/progs/trivial/lineloop-clip.c @@ -118,7 +118,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/lineloop.c b/progs/trivial/lineloop.c index 7500c54fc2..fab7d1ea02 100644 --- a/progs/trivial/lineloop.c +++ b/progs/trivial/lineloop.c @@ -118,7 +118,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/point-clip.c b/progs/trivial/point-clip.c index 32792047c6..7fec54e1db 100644 --- a/progs/trivial/point-clip.c +++ b/progs/trivial/point-clip.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/point-param.c b/progs/trivial/point-param.c index c5424682b8..c50b7cb103 100644 --- a/progs/trivial/point-param.c +++ b/progs/trivial/point-param.c @@ -127,7 +127,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/point-wide.c b/progs/trivial/point-wide.c index 473ca043f1..d1038ecfa1 100644 --- a/progs/trivial/point-wide.c +++ b/progs/trivial/point-wide.c @@ -33,6 +33,8 @@ GLenum doubleBuffer; +static GLboolean smooth = GL_FALSE; + static void Init(void) { @@ -58,6 +60,9 @@ static void Key(unsigned char key, int x, int y) { switch (key) { + case 's': + smooth = !smooth; + break; case 27: exit(1); default: @@ -73,6 +78,16 @@ static void Draw(void) glPointSize(8.0); + if (smooth) { + glEnable(GL_POINT_SMOOTH); + glEnable(GL_BLEND); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + } + else { + glDisable(GL_POINT_SMOOTH); + glDisable(GL_BLEND); + } + glBegin(GL_POINTS); glColor3f(1,0,0); glVertex3f( 0.9, -0.9, -30.0); @@ -122,7 +137,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/point.c b/progs/trivial/point.c index 87465bfb2c..8dabfb6ca6 100644 --- a/progs/trivial/point.c +++ b/progs/trivial/point.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/poly-flat.c b/progs/trivial/poly-flat.c index 747b24dc0c..a847d6828a 100644 --- a/progs/trivial/poly-flat.c +++ b/progs/trivial/poly-flat.c @@ -122,7 +122,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/poly-unfilled.c b/progs/trivial/poly-unfilled.c index e0ae463b08..ae092a830a 100644 --- a/progs/trivial/poly-unfilled.c +++ b/progs/trivial/poly-unfilled.c @@ -121,7 +121,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/poly.c b/progs/trivial/poly.c index bdb9e27aa9..2f254de481 100644 --- a/progs/trivial/poly.c +++ b/progs/trivial/poly.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-clip-all-vertices.c b/progs/trivial/quad-clip-all-vertices.c index 019ef0c479..3e0f3d9494 100644 --- a/progs/trivial/quad-clip-all-vertices.c +++ b/progs/trivial/quad-clip-all-vertices.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-clip-nearplane.c b/progs/trivial/quad-clip-nearplane.c index 7e12e58a19..e76eb29f89 100644 --- a/progs/trivial/quad-clip-nearplane.c +++ b/progs/trivial/quad-clip-nearplane.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-clip.c b/progs/trivial/quad-clip.c index 9f3a45caec..504fef3dc5 100644 --- a/progs/trivial/quad-clip.c +++ b/progs/trivial/quad-clip.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-degenerate.c b/progs/trivial/quad-degenerate.c index b14b0f1d87..8304740857 100644 --- a/progs/trivial/quad-degenerate.c +++ b/progs/trivial/quad-degenerate.c @@ -125,7 +125,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-flat.c b/progs/trivial/quad-flat.c index d6e9f02120..bd8be7c43e 100644 --- a/progs/trivial/quad-flat.c +++ b/progs/trivial/quad-flat.c @@ -130,7 +130,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-offset-factor.c b/progs/trivial/quad-offset-factor.c index 861d3461c0..90943d908f 100644 --- a/progs/trivial/quad-offset-factor.c +++ b/progs/trivial/quad-offset-factor.c @@ -27,11 +27,6 @@ #include <stdlib.h> #include <GL/glut.h> - -#define CI_OFFSET_1 16 -#define CI_OFFSET_2 32 - - GLenum doubleBuffer; static void Init(void) @@ -45,7 +40,6 @@ static void Init(void) static void Reshape(int width, int height) { - glViewport(0, 0, (GLint)width, (GLint)height); glMatrixMode(GL_PROJECTION); @@ -56,7 +50,6 @@ static void Reshape(int width, int height) static void Key(unsigned char key, int x, int y) { - switch (key) { case 27: exit(1); @@ -75,7 +68,6 @@ static void quad( float half ) glVertex3f(-half/9.0, half/9.0, -25.0 - half); glVertex3f(-half/9.0, -half/9.0, -25.0 - half); glEnd(); - } static void Draw(void) @@ -83,27 +75,24 @@ static void Draw(void) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnable(GL_DEPTH_TEST); - - + /* red: offset back */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(1, 0); - glColor3f(1,0,0); quad(9); + /* green: no offset */ glDisable(GL_POLYGON_OFFSET_FILL); glColor3f(0,1,0); quad(6); - + /* black: offset zero, should not be visible because of z test */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(0, 0); - - /* Black - should not be visible - */ glColor3f(0,0,0); quad(6); + /* blue: offset forward */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(-1, 0); glColor3f(0,0,1); @@ -149,7 +138,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB | GLUT_DEPTH; + type = GLUT_RGB | GLUT_ALPHA | GLUT_DEPTH; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); @@ -163,5 +152,5 @@ int main(int argc, char **argv) glutKeyboardFunc(Key); glutDisplayFunc(Draw); glutMainLoop(); - return 0; + return 0; } diff --git a/progs/trivial/quad-offset-unfilled.c b/progs/trivial/quad-offset-unfilled.c index 1cecf3c1ce..32b2129727 100644 --- a/progs/trivial/quad-offset-unfilled.c +++ b/progs/trivial/quad-offset-unfilled.c @@ -149,7 +149,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB | GLUT_DEPTH; + type = GLUT_RGB | GLUT_ALPHA | GLUT_DEPTH; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-offset-units.c b/progs/trivial/quad-offset-units.c index 5c41be308e..d5db21469e 100644 --- a/progs/trivial/quad-offset-units.c +++ b/progs/trivial/quad-offset-units.c @@ -27,11 +27,6 @@ #include <stdlib.h> #include <GL/glut.h> - -#define CI_OFFSET_1 16 -#define CI_OFFSET_2 32 - - GLenum doubleBuffer; static void Init(void) @@ -45,7 +40,6 @@ static void Init(void) static void Reshape(int width, int height) { - glViewport(0, 0, (GLint)width, (GLint)height); glMatrixMode(GL_PROJECTION); @@ -56,7 +50,6 @@ static void Reshape(int width, int height) static void Key(unsigned char key, int x, int y) { - switch (key) { case 27: exit(1); @@ -75,7 +68,6 @@ static void quad( float half ) glVertex3f(-half/9.0, half/9.0, -25.0 - half); glVertex3f(-half/9.0, -half/9.0, -25.0 - half); glEnd(); - } static void Draw(void) @@ -83,27 +75,26 @@ static void Draw(void) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnable(GL_DEPTH_TEST); - - + /* red: offset back */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(0, 4); - glColor3f(1,0,0); quad(9); + /* black: no offset */ glDisable(GL_POLYGON_OFFSET_FILL); glColor3f(0,0,0); quad(6); + /* green: offset 0 (this should obscure the black quad) */ glEnable(GL_POLYGON_OFFSET_FILL); glPolygonOffset(0, 0); - glDepthFunc( GL_EQUAL ); glColor3f(0,1,0); quad(6); - glDepthFunc( GL_LESS ); - + /* blue: offset forward */ + glDepthFunc( GL_LESS ); glPolygonOffset(0, -4); glColor3f(0,0,1); quad(3); @@ -148,7 +139,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB | GLUT_DEPTH; + type = GLUT_RGB | GLUT_ALPHA | GLUT_DEPTH; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); @@ -162,5 +153,5 @@ int main(int argc, char **argv) glutKeyboardFunc(Key); glutDisplayFunc(Draw); glutMainLoop(); - return 0; + return 0; } diff --git a/progs/trivial/quad-tex-3d.c b/progs/trivial/quad-tex-3d.c index 0b2dcc08a5..fd02d9d6ad 100644 --- a/progs/trivial/quad-tex-3d.c +++ b/progs/trivial/quad-tex-3d.c @@ -159,7 +159,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quad-unfilled.c b/progs/trivial/quad-unfilled.c index 9d63d2dfb9..9d0087ce08 100644 --- a/progs/trivial/quad-unfilled.c +++ b/progs/trivial/quad-unfilled.c @@ -121,7 +121,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quads.c b/progs/trivial/quads.c index 1ca82cd9f8..307a9e0720 100644 --- a/progs/trivial/quads.c +++ b/progs/trivial/quads.c @@ -138,7 +138,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quadstrip-flat.c b/progs/trivial/quadstrip-flat.c index 061a0e409e..d02135f702 100644 --- a/progs/trivial/quadstrip-flat.c +++ b/progs/trivial/quadstrip-flat.c @@ -132,7 +132,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/quadstrip.c b/progs/trivial/quadstrip.c index 342463f1a2..ff8644be09 100644 --- a/progs/trivial/quadstrip.c +++ b/progs/trivial/quadstrip.c @@ -126,7 +126,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-blend.c b/progs/trivial/tri-blend.c index 284d15fd3c..58c451c976 100644 --- a/progs/trivial/tri-blend.c +++ b/progs/trivial/tri-blend.c @@ -132,7 +132,7 @@ void keyboard(unsigned char key, int x, int y) int main(int argc, char** argv) { glutInit(&argc, argv); - glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); + glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_ALPHA); glutInitWindowSize (200, 200); glutCreateWindow (argv[0]); init(); diff --git a/progs/trivial/tri-clip.c b/progs/trivial/tri-clip.c index bf48533adc..f30445cdba 100644 --- a/progs/trivial/tri-clip.c +++ b/progs/trivial/tri-clip.c @@ -28,26 +28,21 @@ #include <GL/glut.h> -#define CI_OFFSET_1 16 -#define CI_OFFSET_2 32 +static GLenum doubleBuffer; +static GLfloat Xpos = 0, Ypos = 0; -GLenum doubleBuffer; - static void Init(void) { fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); - - glClearColor(0.0, 0.0, 1.0, 0.0); + glClearColor(0.0, 0.0, 1.0, 0.0); } static void Reshape(int width, int height) { - glViewport(0, 0, (GLint)width, (GLint)height); - glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); @@ -56,21 +51,45 @@ static void Reshape(int width, int height) static void Key(unsigned char key, int x, int y) { - switch (key) { case 27: exit(1); default: return; } - glutPostRedisplay(); } +static void +SpecialKey(int key, int x, int y) +{ + const GLfloat step = 0.25; + (void) x; + (void) y; + switch (key) { + case GLUT_KEY_UP: + Ypos += step; + break; + case GLUT_KEY_DOWN: + Ypos -= step; + break; + case GLUT_KEY_LEFT: + Xpos -= step; + break; + case GLUT_KEY_RIGHT: + Xpos += step; + break; + } + glutPostRedisplay(); +} + static void Draw(void) { glClear(GL_COLOR_BUFFER_BIT); + glPushMatrix(); + glTranslatef(Xpos, Ypos, 0); + glBegin(GL_TRIANGLES); glColor3f(0,0,.7); glVertex3f( 0.9, -0.9, -30.0); @@ -80,12 +99,13 @@ static void Draw(void) glVertex3f(-1.9, 0.0, -30.0); glEnd(); + glPopMatrix(); + glFlush(); if (doubleBuffer) { glutSwapBuffers(); } - } static GLenum Args(int argc, char **argv) @@ -131,7 +151,8 @@ int main(int argc, char **argv) glutReshapeFunc(Reshape); glutKeyboardFunc(Key); + glutSpecialFunc(SpecialKey); glutDisplayFunc(Draw); glutMainLoop(); - return 0; + return 0; } diff --git a/progs/trivial/tri-cull.c b/progs/trivial/tri-cull.c index 20aeaf1d7c..2eead84115 100644 --- a/progs/trivial/tri-cull.c +++ b/progs/trivial/tri-cull.c @@ -27,25 +27,45 @@ #include <stdlib.h> #include <GL/glut.h> +static GLenum doubleBuffer; +static GLint cullmode = 0; +static GLenum front = GL_CCW; /* GL default */ -#define CI_OFFSET_1 16 -#define CI_OFFSET_2 32 - - -GLenum doubleBuffer; +static void cull(void) +{ + cullmode = (cullmode + 1) % 4; + if (cullmode == 0) { + glCullFace(GL_FRONT); + glEnable(GL_CULL_FACE); + printf("cull GL_FRONT\n"); + } + else if (cullmode == 1) { + glCullFace(GL_BACK); + glEnable(GL_CULL_FACE); + printf("cull GL_BACK\n"); + } + else if (cullmode == 2) { + glCullFace(GL_FRONT_AND_BACK); + glEnable(GL_CULL_FACE); + printf("cull GL_FRONT_AND_BACK\n"); + } + else { + glDisable(GL_CULL_FACE); + printf("cull none\n"); + } +} static void Init(void) { fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); - - glClearColor(0.0, 0.0, 1.0, 0.0); + glClearColor(0.0, 0.0, 1.0, 0.0); + cull(); } static void Reshape(int width, int height) { - glViewport(0, 0, (GLint)width, (GLint)height); glMatrixMode(GL_PROJECTION); @@ -56,15 +76,21 @@ static void Reshape(int width, int height) static void Key(unsigned char key, int x, int y) { - - switch (key) { - case 27: - exit(1); - default: - return; - } - - glutPostRedisplay(); + switch (key) { + case 27: + exit(1); + case 'c': + cull(); + break; + case 'f': + front = ((front == GL_CCW) ? GL_CW : GL_CCW); + glFrontFace(front); + printf("front face = %s\n", front == GL_CCW ? "GL_CCW" : "GL_CW"); + break; + default: + return; + } + glutPostRedisplay(); } static void Draw(void) @@ -72,12 +98,22 @@ static void Draw(void) glClear(GL_COLOR_BUFFER_BIT); glBegin(GL_TRIANGLES); - glColor3f(0,0,1); - glVertex3f( -1.5, 0.5, -30.0); - glColor3f(1,0,0); - glVertex3f( 0, 2.0, -30.0); - glColor3f(0,1,0); - glVertex3f(-1.5, 2.0, -30.0); + /* CCW / front-facing */ + glColor3f(0,0,.7); + glVertex3f(-0.1, -0.9, -30.0); + glColor3f(.8,0,0); + glVertex3f(-0.1, 0.9, -30.0); + glColor3f(0,.9,0); + glVertex3f(-0.9, 0.0, -30.0); + + /* CW / back-facing */ + glColor3f(0,0,.7); + glVertex3f( 0.1, -0.9, -30.0); + glColor3f(.8,0,0); + glVertex3f( 0.1, 0.9, -30.0); + glColor3f(0,.9,0); + glVertex3f( 0.9, 0.0, -30.0); + glEnd(); glFlush(); @@ -118,7 +154,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); @@ -132,5 +168,5 @@ int main(int argc, char **argv) glutKeyboardFunc(Key); glutDisplayFunc(Draw); glutMainLoop(); - return 0; + return 0; } diff --git a/progs/trivial/tri-dlist.c b/progs/trivial/tri-dlist.c index e0ab285eff..c21c4714ad 100644 --- a/progs/trivial/tri-dlist.c +++ b/progs/trivial/tri-dlist.c @@ -132,7 +132,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-edgeflag.c b/progs/trivial/tri-edgeflag.c index bdc0eaa253..41899c2eb4 100644 --- a/progs/trivial/tri-edgeflag.c +++ b/progs/trivial/tri-edgeflag.c @@ -27,25 +27,18 @@ #include <stdlib.h> #include <GL/glut.h> - -#define CI_OFFSET_1 16 -#define CI_OFFSET_2 32 - - -GLenum doubleBuffer; +static GLenum doubleBuffer; +static GLenum frontface = GL_CCW; static void Init(void) { fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); - - glClearColor(0.0, 0.0, 1.0, 0.0); } static void Reshape(int width, int height) { - glViewport(0, 0, (GLint)width, (GLint)height); glMatrixMode(GL_PROJECTION); @@ -56,13 +49,16 @@ static void Reshape(int width, int height) static void Key(unsigned char key, int x, int y) { - - switch (key) { - case 27: - exit(1); - default: - return; - } + switch (key) { + case 'f': + frontface = (frontface == GL_CCW) ? GL_CW : GL_CCW; + glFrontFace(frontface); + break; + case 27: + exit(1); + default: + return; + } glutPostRedisplay(); } @@ -75,7 +71,7 @@ static void Draw(void) glBegin(GL_TRIANGLES); glEdgeFlag(1); - glColor3f(0,0,.7); + glColor3f(0.3,0.3,.9); glVertex3f( 0.9, -0.9, -0.0); glEdgeFlag(0); glColor3f(.8,0,0); @@ -123,7 +119,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); @@ -137,5 +133,5 @@ int main(int argc, char **argv) glutKeyboardFunc(Key); glutDisplayFunc(Draw); glutMainLoop(); - return 0; + return 0; } diff --git a/progs/trivial/tri-flat-clip.c b/progs/trivial/tri-flat-clip.c index fafa64914d..155b0c4f8d 100644 --- a/progs/trivial/tri-flat-clip.c +++ b/progs/trivial/tri-flat-clip.c @@ -119,7 +119,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-flat.c b/progs/trivial/tri-flat.c index fb2cdbd7bb..0583a2a99a 100644 --- a/progs/trivial/tri-flat.c +++ b/progs/trivial/tri-flat.c @@ -119,7 +119,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-tex-3d.c b/progs/trivial/tri-tex-3d.c index 6a9d1d1bf6..613803fd1b 100644 --- a/progs/trivial/tri-tex-3d.c +++ b/progs/trivial/tri-tex-3d.c @@ -152,7 +152,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-unfilled-clip.c b/progs/trivial/tri-unfilled-clip.c index d486af2365..df161df3fb 100644 --- a/progs/trivial/tri-unfilled-clip.c +++ b/progs/trivial/tri-unfilled-clip.c @@ -119,7 +119,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-unfilled-smooth.c b/progs/trivial/tri-unfilled-smooth.c index e41903a3d5..f70c1cd9d4 100644 --- a/progs/trivial/tri-unfilled-smooth.c +++ b/progs/trivial/tri-unfilled-smooth.c @@ -132,7 +132,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-unfilled-userclip.c b/progs/trivial/tri-unfilled-userclip.c index dc93a8f1ab..9201f9d433 100644 --- a/progs/trivial/tri-unfilled-userclip.c +++ b/progs/trivial/tri-unfilled-userclip.c @@ -123,7 +123,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-unfilled.c b/progs/trivial/tri-unfilled.c index 73961bc93a..1e44823db5 100644 --- a/progs/trivial/tri-unfilled.c +++ b/progs/trivial/tri-unfilled.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-userclip.c b/progs/trivial/tri-userclip.c index cde9662ace..ccf631dff8 100644 --- a/progs/trivial/tri-userclip.c +++ b/progs/trivial/tri-userclip.c @@ -122,7 +122,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tri-z.c b/progs/trivial/tri-z.c new file mode 100644 index 0000000000..ae25900a35 --- /dev/null +++ b/progs/trivial/tri-z.c @@ -0,0 +1,131 @@ +/* + * Copyright (c) 1993-1997, Silicon Graphics, Inc. + * ALL RIGHTS RESERVED + * Permission to use, copy, modify, and distribute this software for + * any purpose and without fee is hereby granted, provided that the above + * copyright notice appear in all copies and that both the copyright notice + * and this permission notice appear in supporting documentation, and that + * the name of Silicon Graphics, Inc. not be used in advertising + * or publicity pertaining to distribution of the software without specific, + * written prior permission. + * + * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" + * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, + * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR + * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON + * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, + * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY + * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, + * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF + * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN + * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE + * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. + * + * US Government Users Restricted Rights + * Use, duplication, or disclosure by the Government is subject to + * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph + * (c)(1)(ii) of the Rights in Technical Data and Computer Software + * clause at DFARS 252.227-7013 and/or in similar or successor + * clauses in the FAR or the DOD or NASA FAR Supplement. + * Unpublished-- rights reserved under the copyright laws of the + * United States. Contractor/manufacturer is Silicon Graphics, + * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311. + * + * OpenGL(R) is a registered trademark of Silicon Graphics, Inc. + */ + +#include <GL/glut.h> +#include <stdlib.h> + +static int leftFirst = GL_TRUE; + +static void init(void) +{ + glEnable(GL_DEPTH_TEST); + glClearColor (1.0, 0.0, 0.0, 0.0); +} + +static void drawLeftTriangle(void) +{ + /* draw yellow triangle on LHS of screen */ + glBegin (GL_TRIANGLES); + glColor4f(1.0, 1.0, 0.0, 0.75); + glVertex3f(0.1, 0.9, -1.0); + glVertex3f(0.1, 0.1, -1.0); + glVertex3f(0.8, 0.5, 1.0); + glEnd(); +} + +static void drawRightTriangle(void) +{ + /* draw cyan triangle on RHS of screen */ + glBegin (GL_TRIANGLES); + glColor4f(0.0, 1.0, 1.0, 0.75); + glVertex3f(0.9, 0.9, 0.0); + glVertex3f(0.2, 0.5, 0.0); + glVertex3f(0.9, 0.1, 0.0); + glEnd(); +} + +void display(void) +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + if (leftFirst) { + drawLeftTriangle(); + drawRightTriangle(); + } + else { + drawRightTriangle(); + drawLeftTriangle(); + } + + glFlush(); +} + +void reshape(int w, int h) +{ + glViewport(0, 0, (GLsizei) w, (GLsizei) h); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + if (w <= h) + gluOrtho2D (0.0, 1.0, 0.0, 1.0*(GLfloat)h/(GLfloat)w); + else + gluOrtho2D (0.0, 1.0*(GLfloat)w/(GLfloat)h, 0.0, 1.0); +} + +/* ARGSUSED1 */ +void keyboard(unsigned char key, int x, int y) +{ + switch (key) { + case 't': + case 'T': + leftFirst = !leftFirst; + glutPostRedisplay(); + break; + case 27: /* Escape key */ + exit(0); + break; + default: + break; + } +} + +/* Main Loop + * Open window with initial window size, title bar, + * RGBA display mode, and handle input events. + */ +int main(int argc, char** argv) +{ + glutInit(&argc, argv); + glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); + glutInitWindowSize (200, 200); + glutCreateWindow (argv[0]); + init(); + glutReshapeFunc (reshape); + glutKeyboardFunc (keyboard); + glutDisplayFunc (display); + glutMainLoop(); + return 0; +} diff --git a/progs/trivial/tri.c b/progs/trivial/tri.c index 58a650b559..51395f0a41 100644 --- a/progs/trivial/tri.c +++ b/progs/trivial/tri.c @@ -32,7 +32,7 @@ #define CI_OFFSET_2 32 -GLenum doubleBuffer; +GLenum doubleBuffer = 1; static void Init(void) { @@ -40,7 +40,7 @@ static void Init(void) fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); - glClearColor(0.0, 0.0, 1.0, 0.0); + glClearColor(0.3, 0.1, 0.3, 0.0); } static void Reshape(int width, int height) @@ -91,8 +91,6 @@ static GLenum Args(int argc, char **argv) { GLint i; - doubleBuffer = GL_FALSE; - for (i = 1; i < argc; i++) { if (strcmp(argv[i], "-sb") == 0) { doubleBuffer = GL_FALSE; @@ -118,7 +116,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); diff --git a/progs/trivial/tristrip.c b/progs/trivial/tristrip.c index fa82a73711..51ea4f2325 100644 --- a/progs/trivial/tristrip.c +++ b/progs/trivial/tristrip.c @@ -120,7 +120,7 @@ int main(int argc, char **argv) glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); - type = GLUT_RGB; + type = GLUT_RGB | GLUT_ALPHA; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; glutInitDisplayMode(type); |