Add uniforms

[wasm.git] / test.cpp

diff --git a/test.cpp b/test.cpp
index 065ed80de76182eded8aab8c084ba78751d82050..cbdf3707e6cd47a2a6259809024a112009c61135 100644 (file)
--- a/test.cpp
+++ b/test.cpp
@@ -1,11 +1,15 @@
 #include <GLES3/gl32.h>
 #include <string>
 #include <vector>
+#include <glm/glm.hpp>
+#include <glm/ext.hpp>
+#include <glm/gtc/type_ptr.hpp>
 
 const char* vertShaderSrc = R"(
 attribute vec4 vertPos;
+uniform mat4 model;
 void main() {
-       gl_Position = vertPos;
+       gl_Position = model * vertPos;
 }
 )";
 
@@ -15,6 +19,8 @@ void main() {
 }
 )";
 
+GLuint program;
+
 extern "C" void setup() {
        GLuint vertShader = glCreateShader(GL_VERTEX_SHADER);
        const char* sources[1] = { vertShaderSrc };
@@ -28,7 +34,7 @@ extern "C" void setup() {
                        new const GLint[1] { (GLint)strlen(fragShaderSrc) });
        glCompileShader(fragShader);
 
-       GLuint program = glCreateProgram();
+       program = glCreateProgram();
        glAttachShader(program, vertShader);
        glAttachShader(program, fragShader);
        glLinkProgram(program);
@@ -48,3 +54,9 @@ extern "C" void setup() {
        glEnableVertexAttribArray(vertPosLoc);
        glVertexAttribPointer(vertPosLoc, 3, GL_FLOAT, false, 0, 0);
 }
+
+extern "C" void update(int tick) {
+       GLuint modelLoc = glGetUniformLocation(program, "model");
+       const glm::mat4 model = glm::rotate(glm::mat4(1), (float)tick * 0.001f, glm::vec3(0, 0, 1));
+       glUniformMatrix4fv(modelLoc, 1, false, glm::value_ptr(model));
+}