diff options
author | Eric Anholt <eric@anholt.net> | 2010-05-21 09:32:38 -0700 |
---|---|---|
committer | Eric Anholt <eric@anholt.net> | 2010-05-21 12:20:39 -0700 |
commit | 68fc4b415e322f6744299e39864fbc377c6eff74 (patch) | |
tree | 4bafffd8b0105174f3c5c0ae327a005be9145990 /progs/glsl/array.c | |
parent | e4f4489e3fc0b36d72821b55794fb843b2b7fa5f (diff) |
Remove demos that have moved to git+ssh://git.freedesktop.org/git/mesa/demos.
The remaining programs are ones I've had difficulty finding a build
environment for to make the build system or are unit tests that should
probably live next to their code instead. Hopefully people can bring
over the build for remaining pieces they care about.
Diffstat (limited to 'progs/glsl/array.c')
-rw-r--r-- | progs/glsl/array.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/progs/glsl/array.c b/progs/glsl/array.c deleted file mode 100644 index 4ed18485ea..0000000000 --- a/progs/glsl/array.c +++ /dev/null @@ -1,258 +0,0 @@ -/** - * Test variable array indexing in a vertex shader. - * Brian Paul - * 17 April 2009 - */ - -#include <assert.h> -#include <string.h> -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include <GL/glew.h> -#include <GL/glut.h> -#include "shaderutil.h" - - -/** - * The vertex position.z is used as a (variable) index into an - * array which returns a new Z value. - */ -static const char *VertShaderText = - "uniform sampler2D tex1; \n" - "uniform float HeightArray[20]; \n" - "void main() \n" - "{ \n" - " vec4 pos = gl_Vertex; \n" - " int i = int(pos.z * 9.5); \n" - " pos.z = HeightArray[i]; \n" - " gl_Position = gl_ModelViewProjectionMatrix * pos; \n" - " gl_FrontColor = pos; \n" - "} \n"; - -static const char *FragShaderText = - "void main() \n" - "{ \n" - " gl_FragColor = gl_Color; \n" - "} \n"; - - -static GLuint fragShader; -static GLuint vertShader; -static GLuint program; - -static GLint win = 0; -static GLboolean Anim = GL_TRUE; -static GLboolean WireFrame = GL_TRUE; -static GLfloat xRot = -70.0f, yRot = 0.0f, zRot = 0.0f; - - -static void -Idle(void) -{ - zRot = 90 + glutGet(GLUT_ELAPSED_TIME) * 0.05; - glutPostRedisplay(); -} - - -/** z=f(x,y) */ -static float -fz(float x, float y) -{ - return fabs(cos(1.5*x) + cos(1.5*y)); -} - - -static void -DrawMesh(void) -{ - GLfloat xmin = -2.0, xmax = 2.0; - GLfloat ymin = -2.0, ymax = 2.0; - GLuint xdivs = 20, ydivs = 20; - GLfloat dx = (xmax - xmin) / xdivs; - GLfloat dy = (ymax - ymin) / ydivs; - GLfloat ds = 1.0 / xdivs, dt = 1.0 / ydivs; - GLfloat x, y, s, t; - GLuint i, j; - - y = ymin; - t = 0.0; - for (i = 0; i < ydivs; i++) { - x = xmin; - s = 0.0; - glBegin(GL_QUAD_STRIP); - for (j = 0; j < xdivs; j++) { - float z0 = fz(x, y), z1 = fz(x, y + dy); - - glTexCoord2f(s, t); - glVertex3f(x, y, z0); - - glTexCoord2f(s, t + dt); - glVertex3f(x, y + dy, z1); - x += dx; - s += ds; - } - glEnd(); - y += dy; - t += dt; - } -} - - -static void -Redisplay(void) -{ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - if (WireFrame) - glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); - else - glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); - - glPushMatrix(); - glRotatef(xRot, 1.0f, 0.0f, 0.0f); - glRotatef(yRot, 0.0f, 1.0f, 0.0f); - glRotatef(zRot, 0.0f, 0.0f, 1.0f); - - glPushMatrix(); - DrawMesh(); - glPopMatrix(); - - glPopMatrix(); - - glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); - - glutSwapBuffers(); -} - - -static void -Reshape(int width, int height) -{ - glViewport(0, 0, width, height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0.0f, 0.0f, -15.0f); -} - - -static void -CleanUp(void) -{ - glDeleteShader(fragShader); - glDeleteShader(vertShader); - glDeleteProgram(program); - glutDestroyWindow(win); -} - - -static void -Key(unsigned char key, int x, int y) -{ - const GLfloat step = 2.0; - (void) x; - (void) y; - - switch(key) { - case 'a': - Anim = !Anim; - if (Anim) - glutIdleFunc(Idle); - else - glutIdleFunc(NULL); - break; - case 'w': - WireFrame = !WireFrame; - break; - case 'z': - zRot += step; - break; - case 'Z': - zRot -= step; - break; - case 27: - CleanUp(); - exit(0); - break; - } - glutPostRedisplay(); -} - - -static void -SpecialKey(int key, int x, int y) -{ - const GLfloat step = 2.0; - - (void) x; - (void) y; - - switch(key) { - case GLUT_KEY_UP: - xRot += step; - break; - case GLUT_KEY_DOWN: - xRot -= step; - break; - case GLUT_KEY_LEFT: - yRot -= step; - break; - case GLUT_KEY_RIGHT: - yRot += step; - break; - } - glutPostRedisplay(); -} - - -static void -Init(void) -{ - GLfloat HeightArray[20]; - GLint u, i; - - if (!ShadersSupported()) - exit(1); - - vertShader = CompileShaderText(GL_VERTEX_SHADER, VertShaderText); - fragShader = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderText); - program = LinkShaders(vertShader, fragShader); - - glUseProgram(program); - - /* Setup the HeightArray[] uniform */ - for (i = 0; i < 20; i++) - HeightArray[i] = i / 20.0; - u = glGetUniformLocation(program, "HeightArray"); - glUniform1fv(u, 20, HeightArray); - - assert(glGetError() == 0); - - glClearColor(0.4f, 0.4f, 0.8f, 0.0f); - glEnable(GL_DEPTH_TEST); - glColor3f(1, 1, 1); -} - - -int -main(int argc, char *argv[]) -{ - glutInit(&argc, argv); - glutInitWindowSize(500, 500); - glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); - win = glutCreateWindow(argv[0]); - glewInit(); - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutSpecialFunc(SpecialKey); - glutDisplayFunc(Redisplay); - Init(); - if (Anim) - glutIdleFunc(Idle); - glutMainLoop(); - return 0; -} - |