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Diffstat (limited to 'progs/glsl/skinning.c')
| -rw-r--r-- | progs/glsl/skinning.c | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/progs/glsl/skinning.c b/progs/glsl/skinning.c deleted file mode 100644 index 2b96f31d06..0000000000 --- a/progs/glsl/skinning.c +++ /dev/null @@ -1,280 +0,0 @@ -/** - * Vertex "skinning" example. - * The idea is there are multiple modeling matrices applied to every - * vertex. Weighting values in [0,1] control the influence of each - * matrix on each vertex. - * - * 4 Nov 2008 - */ - -#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" - -#ifndef M_PI -#define M_PI 3.1415926535 -#endif - -static char *FragProgFile = "skinning.frag"; -static char *VertProgFile = "skinning.vert"; - -/* program/shader objects */ -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 = 0.0f, yRot = 90.0f, zRot = 0.0f; - -#define NUM_MATS 2 - -static GLfloat Matrices[NUM_MATS][16]; -static GLint uMat0, uMat1; -static GLint WeightAttr; - - -static void -Idle(void) -{ - yRot = 90 + glutGet(GLUT_ELAPSED_TIME) * 0.005; - glutPostRedisplay(); -} - - -static void -Cylinder(GLfloat length, GLfloat radius, GLint slices, GLint stacks) -{ - float dw = 1.0 / (stacks - 1); - float dz = length / stacks; - int i, j; - - for (j = 0; j < stacks; j++) { - float w0 = j * dw; - float z0 = j * dz; - - glBegin(GL_TRIANGLE_STRIP); - for (i = 0; i < slices; i++) { - float a = (float) i / (slices - 1) * M_PI * 2.0; - float x = radius * cos(a); - float y = radius * sin(a); - glVertexAttrib1f(WeightAttr, w0); - glNormal3f(x, y, 0.0); - glVertex3f(x, y, z0); - - glVertexAttrib1f(WeightAttr, w0 + dw); - glNormal3f(x, y, 0.0); - glVertex3f(x, y, z0 + dz); - } - glEnd(); - } -} - - -/** - * Update/animate the two matrices. One rotates, the other scales. - */ -static void -UpdateMatrices(void) -{ - GLfloat t = glutGet(GLUT_ELAPSED_TIME) * 0.0025; - GLfloat scale = 0.5 * (1.1 + sin(0.5 * t)); - GLfloat rot = cos(t) * 90.0; - - glPushMatrix(); - glLoadIdentity(); - glScalef(1.0, scale, 1.0); - glGetFloatv(GL_MODELVIEW_MATRIX, Matrices[0]); - glPopMatrix(); - - glPushMatrix(); - glLoadIdentity(); - glRotatef(rot, 0, 0, 1); - glGetFloatv(GL_MODELVIEW_MATRIX, Matrices[1]); - glPopMatrix(); -} - - -static void -Redisplay(void) -{ - UpdateMatrices(); - - glUniformMatrix4fv(uMat0, 1, GL_FALSE, Matrices[0]); - glUniformMatrix4fv(uMat1, 1, GL_FALSE, Matrices[1]); - - if (WireFrame) - glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); - else - glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - 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(); - glTranslatef(0, 0, -2.5); - Cylinder(5.0, 1.0, 10, 20); - glPopMatrix(); - - glPopMatrix(); - - 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) -{ - if (!ShadersSupported()) - exit(1); - - vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile); - fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile); - program = LinkShaders(vertShader, fragShader); - - glUseProgram(program); - - uMat0 = glGetUniformLocation(program, "mat0"); - uMat1 = glGetUniformLocation(program, "mat1"); - - WeightAttr = glGetAttribLocation(program, "weight"); - - assert(glGetError() == 0); - - glClearColor(0.4f, 0.4f, 0.8f, 0.0f); - - glEnable(GL_DEPTH_TEST); - - glColor3f(1, 0, 0); -} - - -static void -ParseOptions(int argc, char *argv[]) -{ - int i; - for (i = 1; i < argc; i++) { - if (strcmp(argv[i], "-fs") == 0) { - FragProgFile = argv[i+1]; - } - else if (strcmp(argv[i], "-vs") == 0) { - VertProgFile = argv[i+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); - ParseOptions(argc, argv); - Init(); - if (Anim) - glutIdleFunc(Idle); - glutMainLoop(); - return 0; -} - |