Do boning and animation properly

[opengl.git] / util.cpp

diff --git a/util.cpp b/util.cpp
new file mode 100644 (file)
index 0000000..796017d
--- /dev/null
+++ b/util.cpp
@@ -0,0 +1,47 @@
+#include <GL/glew.h>
+#include <glm/ext.hpp>
+#include "shapes.hpp"
+#include "util.hpp"
+
+GLuint utilVao;
+Program *utilProg;
+
+Program *getUtilProg() { return utilProg; }
+
+void initUtilProg() {
+       utilProg = new Program("plainvertex.glsl", "plainfrag.glsl");
+
+       glGenVertexArrays(1, &utilVao);
+       GLuint vbo;
+       glBindVertexArray(utilVao);
+       glGenBuffers(1, &vbo);
+       glBindBuffer(GL_ARRAY_BUFFER, vbo);
+       glBufferData(GL_ARRAY_BUFFER, sizeof(pyramid), pyramid, GL_STATIC_DRAW);
+       GLuint posLoc = glGetAttribLocation(utilProg->progId, "vPosition");
+       glEnableVertexAttribArray(posLoc);
+       glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
+
+       if (glGetError()) abort();
+}
+
+void drawDebugNode(glm::mat4 model, glm::vec4 color) {
+       GLint prevProg; glGetIntegerv(GL_CURRENT_PROGRAM, &prevProg);
+
+       glUseProgram(utilProg->progId);
+
+       glDepthRange(0, 0.01);
+
+       glBindVertexArray(utilVao);
+       model = glm::scale(model, {0.1, 0.3, 0.1});
+       GLuint modelLoc = glGetUniformLocation(utilProg->progId, "model");
+       glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
+
+       GLuint colorLoc = glGetUniformLocation(utilProg->progId, "color");
+       glUniform4fv(colorLoc, 1, glm::value_ptr(color));
+               
+       glDrawArrays(GL_TRIANGLES, 0, 36);
+
+       glDepthRange(0, 1.f);
+
+       glUseProgram(prevProg);
+}