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solid cube

This commit is contained in:
Luca Conte 2025-04-20 02:04:02 +02:00
parent 0aeec51093
commit 5046266906
2 changed files with 34 additions and 24 deletions
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54
src/main.c
View File

@ -25,6 +25,7 @@ GLuint initialWindowWidth = 800;
GLuint initialWindowHeight = 600;
GLfloat aspect;
mat4 projectionMatrix;
int frameCount = 0;
struct timespec last_time, current_time;
@ -81,6 +82,11 @@ void updateStatusDisplay() {
}
}
void recalculateProjectionMatrix() {
mat4BuildPerspective(projectionMatrix, 60 * M_PI / 180, aspect, 0.1, 10);
DEBUG("Recalculating Projection Matrix");
}
void init(void) {
INFO("Compiling Shaders...");
@ -153,24 +159,23 @@ void init(void) {
glPrimitiveRestartIndex(restart);
GLuint indices[] = {
0, 1,
0, 2,
0, 4,
0, 1, 2,
1, 2, 3,
1, 3,
1, 5,
0, 4, 1,
5, 4, 1,
2, 3,
2, 6,
5, 1, 7,
3, 1, 7,
3, 7,
7, 5, 6,
4, 5, 6,
4, 5,
4, 6,
4, 0, 6,
2, 0, 6,
5, 7,
6, 7
2, 3, 6,
7, 3, 6
};
DEBUG("Creating vertext buffer");
@ -212,8 +217,12 @@ void init(void) {
// glEnable(GL_CULL_FACE);
glFrontFace(GL_CCW);
glEnable(GL_DEPTH_TEST);
initialiseStatusDisplay();
recalculateProjectionMatrix();
INFO("--- Initialisation done ---");
}
@ -225,7 +234,7 @@ void draw(void) {
currentHue += 0.0005f;
if (currentHue > 1.0) currentHue = 0.0f;
glClear(GL_COLOR_BUFFER_BIT);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(program);
mat4 transformMatrix;
@ -234,38 +243,39 @@ void draw(void) {
mat4Identity(transformMatrix);
mat4Scale(transformMatrix, transformMatrix, scale);
// mat4RotateZ(transformMatrix, transformMatrix, currentHue * PI * 2);
// mat4RotateY(transformMatrix, transformMatrix, currentHue * PI * 2);
mat4RotateZ(transformMatrix, transformMatrix, currentHue * PI * 2);
mat4RotateY(transformMatrix, transformMatrix, currentHue * PI * 2);
mat4Translate(transformMatrix, transformMatrix, position);
mat4 viewMatrix;
mat4Identity(viewMatrix);
vec3 cameraPos = {0.0f, sin(currentHue * PI * 2), 0.0f};
vec3 cameraLookAt = {0.0f, sin(currentHue * PI * 2), -1.0f};
vec3 cameraPos = {0.0f, 0.0f, 0.0f};
vec3 cameraLookAt = {0.0f, 0.0f, -1.0f};
vec3 cameraUp = {0.0f, 1.0f, 0.0f};
mat4BuildLookAt(viewMatrix, cameraPos, cameraLookAt, cameraUp);
mat4 modelViewMatrix;
mat4Multiply(modelViewMatrix, viewMatrix, transformMatrix);
GLuint modelViewLocation = glGetUniformLocation(program, "uModelView");
glUniformMatrix4fv(modelViewLocation, 1, GL_FALSE, modelViewMatrix);
mat4 projectionMatrix;
mat4BuildPerspective(projectionMatrix, 60 * M_PI / 180, aspect, 0.1, 10);
GLuint projectionLocation = glGetUniformLocation(program, "uProjection");
glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, projectionMatrix);
glBindVertexArray(vertexArrayObject);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
glDrawElements(GL_LINES, 24, GL_UNSIGNED_INT, 0);
glDrawElements(GL_TRIANGLES, 48, GL_UNSIGNED_INT, 0);
}
void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
glViewport(0, 0, width, height);
aspect = (float)width / height;
recalculateProjectionMatrix();
}
int main(int argc, char const *argv[])

2
src/shaders/vertex.glsl
View File

@ -6,6 +6,6 @@ uniform mat4 uProjection;
out vec3 vertexColor;
void main() {
vertexColor = vec3(1.0, 0.1, 0.1);
vertexColor = (aPosition + vec3(1)) / 2;
gl_Position = uProjection * uModelView * vec4(aPosition, 1.0);
}